I cut my mother's firewood and as she bought a Snapper (brand owned by Briggs and Stratton if I'm not mistaken) 82V (72 nominal) battery powered lawn mower I suggested also buying their chainsaw, running on the same (big) battery packs. In other words, we did exactly what their marketeers intended, I suppose
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Mower is pretty good, actually, quite pleasantly surprised.
The chainsaw isn't too bad either in my opinion.
https://www.snapper.com/na/en_us/pr...82volt-max_-lithiumion-cordless-chainsaw.html
The saw has a narrow 18" bar, a bit too long and definitely too flimsy imo.
I can't compare to other battery powered saws, as I never owned or even used any.
Compared to gas saws, you obviously have to deal with a lower chain speed (and worse power to weight ratio). It's quite useful for limbing, however loose sticks/light weight wood get pulled towards you rather than cut.
Apart from the obvious advantages (exhaust related), it's also quite convenient that bar oil consumption is pretty low.
If you get used to the lower chain speed the thing is quite useful. I put down small(ish) cherry trees with it yesterday, 6-8 inch diameter, no issue. As a test, I also bucked quite some 16" dry (dead) spruce with it, no stalling or other issues, if you have the patience of course. Even did some noodling, the thing simply does it although I suppose if you keep on doing that, I well get worn out quickly? Also, batteries die quickly (and get quite warm) with such load on the machine.
If one knows a thing or two about batteries and electricity in general, Li-ion batteries can be rebuilt, and individual 18650 cells don't cost too much (mind the exact specs, though, the 18650 designation is solely based on the physical dimensions of the cells). I would definitely follow the advice given here where it comes to the connections: use a spot welder (and decent quality nickel strips, if needed).